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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2017 dubenju@126.com.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.teapot.db.orm.util.sort;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.teapot.db.orm.IKeyValue;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.teapot.db.orm.mdl.OptOrder;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.Comparator;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>/**<a name="line.25"></a>
<span class="sourceLineNo">026</span> * 比较类。<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @author dubenju@126.com<a name="line.27"></a>
<span class="sourceLineNo">028</span> *<a name="line.28"></a>
<span class="sourceLineNo">029</span> * @param &lt;T&gt; 比较数据的类型。<a name="line.29"></a>
<span class="sourceLineNo">030</span> */<a name="line.30"></a>
<span class="sourceLineNo">031</span>public class DefaultComparator&lt;T&gt; implements Comparator&lt;T&gt; {<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>  private List&lt;OptOrder&gt; sortKeys = null;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>  /**<a name="line.35"></a>
<span class="sourceLineNo">036</span>   * 构造函数.<a name="line.36"></a>
<span class="sourceLineNo">037</span>   * @param keys 比较键名。<a name="line.37"></a>
<span class="sourceLineNo">038</span>   */<a name="line.38"></a>
<span class="sourceLineNo">039</span>  public DefaultComparator(List&lt;OptOrder&gt; keys) {<a name="line.39"></a>
<span class="sourceLineNo">040</span>    this.sortKeys = keys;<a name="line.40"></a>
<span class="sourceLineNo">041</span>  }<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>  /**<a name="line.43"></a>
<span class="sourceLineNo">044</span>   * 比较处理.<a name="line.44"></a>
<span class="sourceLineNo">045</span>   * @param o1 比较数1。<a name="line.45"></a>
<span class="sourceLineNo">046</span>   * @param o2 比较数2。<a name="line.46"></a>
<span class="sourceLineNo">047</span>   * @return int 比较结果。<a name="line.47"></a>
<span class="sourceLineNo">048</span>   */<a name="line.48"></a>
<span class="sourceLineNo">049</span>  @SuppressWarnings("unchecked")<a name="line.49"></a>
<span class="sourceLineNo">050</span>  @Override<a name="line.50"></a>
<span class="sourceLineNo">051</span>  public int compare(T o1, T o2) {<a name="line.51"></a>
<span class="sourceLineNo">052</span>    IKeyValue k1 = (IKeyValue) o1;<a name="line.52"></a>
<span class="sourceLineNo">053</span>    IKeyValue k2 = (IKeyValue) o2;<a name="line.53"></a>
<span class="sourceLineNo">054</span>    int comp = 0;<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>    for (int i = 0; i &lt; this.sortKeys.size(); i ++) {<a name="line.56"></a>
<span class="sourceLineNo">057</span>      @SuppressWarnings("rawtypes")<a name="line.57"></a>
<span class="sourceLineNo">058</span>      Comparable v1 = (Comparable&lt;?&gt;) k1.get(this.sortKeys.get(i).getCloumn());<a name="line.58"></a>
<span class="sourceLineNo">059</span>      Comparable&lt;?&gt; v2 = (Comparable&lt;?&gt;) k2.get(this.sortKeys.get(i).getCloumn());<a name="line.59"></a>
<span class="sourceLineNo">060</span>      comp = v1.compareTo( v2 );<a name="line.60"></a>
<span class="sourceLineNo">061</span>      if (comp != 0) {<a name="line.61"></a>
<span class="sourceLineNo">062</span>        return comp * this.sortKeys.get(i).getOrder();<a name="line.62"></a>
<span class="sourceLineNo">063</span>      }<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span>    return 0;<a name="line.65"></a>
<span class="sourceLineNo">066</span>  }<a name="line.66"></a>
<span class="sourceLineNo">067</span>}<a name="line.67"></a>




























































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